Plow-trip.



J. C. DAHL.

PLOW TRIP.

APPLICATION FILED OCT. 20 |9l7. 1,295,127, Patented Feb.25,1919

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1 f N LS Q0 N @l LQ O gn WWA/5555 J /wf//E 'QVM w 0 0 -D 5y/775 /47'7'/Q/Vfx5 WfQM/ g J. C. DAHL.

PLOW TRIP.

.APPLICATION FILED ocT. 20. Ian.

1,295, l 27. Patented Feb. 25, 1919.

2 SHEETS-SHEET 2.

W/ 775/555755 /NVf/V TOE 5)/ /v//s ATTOENEKS JOHN c. DAHL, 0E PINE RIVER, MINNESOTA.

PLOW-TRIP.

Specification of Letters Patent.

Patented Een. 25, 1919.

Application med october 2o, 1917. i serial No. 197,728.

To all whom t may concern:

Be it known that I, JOHN C. DAHL, a citizen of the United States, residing at Pine River, in the county of Cass and State of -Minnesota, have invented certain new and vand out of the ground, and wherein foot mechanism is provided for imparting such movements to the plow beam, including means foi` positively holding` the plow beam in its lowered position, and for rendering such means inoperative, at will.

The object of the invention is to provide an automatic trip arranged to render the positive means, for holding the plow beam in a lowered position, inoperative, when the plow proper strikes a stone, root or other obstruction, and thereby permits the plow -beam to lift and the plow proper to move out of the ground and away from the obstruction, thus preventing the plow from being damaged or broken.

To the above end, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims. A

In the accompanyingA drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings,

vFigure 1 is a fragmentary side elevation 'of a sulky plow having the invention incorporated therein; f

Fig. 2 is a detail view principally in plan, with some parts sectioned on the line 2 2 of Fig. 1, on an enlarged scale;

` Fig. 3 is a detail view prmcipally in side elevation, with some'parts sectioned on the line 3 3 of Fig.` 2; and

Fig. 4 is a detail v iew, on an enlarged scale, with some lparts's'ectioned, and illustrating the forward end of the plow beam 'and draft device attached thereto.

Of the' parts of the sulky plow illustrated,

Vit is important to note the wheel-supported frame 5, the beam 6 and the plow bottom 7 Tandem U-shaped reversible swinging links 8l suspend the beam 6 from the frame 5 for f lowering and forward movement and for raising and backward movement. A heavy coiled spring 9, attached at its forward end to an Vupwardly projecting post 10 on the plow beam 6 and adjustably connected at its rear end to a post 11 on the frame 5, is under strain to lift the plow beam 6 and move the same rearward.

The plow beam 6 and bottom 7 are lowered and raised by a toggle lever 12-13 and foot levers 14 and 15. l The toggle lever member 12 has its outer end pivoted at 16 to the plow beam 6 and the pivotal connection between the members of said lever is indicated by the numeral 17. The outer end of the toggle lever member 13 is rigidly secured -to i one end of a short horizontal shaft 18, journaled at its intermediate portion `in a bearing 19 on the frame 5.' To the other end of the shaft 18, is rigidly secured the foot lever# 14: which projects upwardly and rearwardly therefrom.

Integrallyr formed with the toggle lever member 13, is a pair of upwardly projecting and laterally spaced lugs 20, between which is mounted the foot lever 15. This foot lever 15 is pivoted at 21 to the lugs 20 and projects -forwardly therefrom. Integrally formed -with the pivoted end of the toggle lever member 13, is a finger 22 'having mounted therein a'set screw 23, arranged to engage the toggle levermemberv 12 and limit the buckling movement thereof.

The foot lever 14, which is relatively long,

is used primarily for lifting the plow beam v 6, but it may also be used for controlling the lowering movement of said beam. The foot lever 15. which is relatively short, is used Vin lowering the plow beam 6 and when thus used, bears against va shoulder 24C on the togglel lever member 13, so that further movementof said lever imparts a like movement to the ktoggle lever'member 13.A 'A spring 25 is under strain to normally 'lift Vthe foot lever 15 out of engagement withfthe shoulder24. v i

Integrally formed with the `pivoted end of the .foot lever-15, is a latchv hook V26 arranged to yieldingly interlock with aI lug 2.7v `tu'ithe bearing 19, under the action of the spring 25, when the plow beam Gisin its uppermost; position, and thereby? lock the same in saidV position. l'soV formed with the bearing 19, isa foot rest 28.v To

the forward end of'- the "plow- Ybea-n1- Gnisrigidly secured a horizontal clevis bar` 29 having formed therein a multiplicity of bores` 30 transversely spaced, with respect Vtofsaid""plow'fbeani;l Y

From the above descriptionitis-.evident that, when the plow beam 6 is in its lowered and-i; forelr-iost.vr position, the ,toggle leve-r 12v-13de'fbuclrledV and thewplow bea-m` 6 4vpositively 1 heldr thereby aga-inst-l lifting Yand vrearward movement. Toy raise the plow beam 6, andfhence, the vplow rbottom 7, -the v operator presses down on the yfootA lever v1st,

to'frst straighten the toggle lever and then lift thefiplow 'beam' 6, 'with -theaassistance of the spring4 9. At' Ythe completion lofthe lifty,ing movement 4'of thefplowbeam 6, the latch hook-26 Vfantomatically, interlocks with the lug 27, and thereby holds the-plow-bea-m 6 1 vand bottom Ziagaiistlowe-ring movement.

ldown-ward ipressurenon, the'foot lever 15,

the f latchfhook I 26 is movedy outof {engage- .men't withvthelug-' anda-said lever movedv into-engagement Vwith ther-shoulder 24. A f,further-1movement of thel 'foot lever 15, to-

gether-'with the/weight of lthe Vplow -beam 6 and plow bottom 7, will overcome -tl1e Vvspring 9- a-ndolower'said beamandl bottom.

Theft-nal movement ony the foot Alever 15 bucklethe' toggle `lever 12J- 13 and. thereby flock-,1 the plowfbeam against llifting movement. Y

. ,Theiparts tl-inefar described'y are ofstand- ,Y ard construction andhave-beenillustrated -s1mply for the purpose of show/ingY the-'invention iny workingv positionzy {Ehe-purpose ofi-my rinvention is to automatically straighten fthe-toggleleverf 1-2-13 and release ithe-plowfbeain 6, when -theplow bottom strikes ai stone, root,y or other obistruction;` With theplow bea-m.- 6 released,

the plow bottomy 7;. willlrecede and,;at lthe Vsame. time,- from fthe obstruction', owing v to: the link congnections- 8,A betweenfsaidf 'bea'r'n f and theframef-and under the action o'fethe spr-ing 9. f As; one' means-fonperforrning thisffunctionyl provide atnp,y arranged ysto beg'achte/ted by asdraftdevice, of novel ',construction, when .fthe plowrbottom 7, meets withI ,resistance Lbeyond a predetermined degree. s

j Thezttip, as shownf isinfsthejformf-of a bellecrank 31 pivoted at? 82 tol theffra'me'- 5,

f with itsshert larm normally projecting downwardly and. forwardly r and inV engagement with the togglelever 12 l3, at the pivotal connection 17, so that by a :forward movement of the long arm Vof said bellcrank, which projects downwardly, will straighten the toggle' lever and render the same inoperative as to holding theV plow beam 6 against lifting movement.

lThe improved draft device comprises a horizontalL lever 83, which extendsvv transverselyfof. the-plowgbeam 6 and is'pivo'tally connected to the clevis bar 29 by aV pair of vertically spacedi links 34. These links 34 'are connectedv1 'tof the' ,clevis fbar :29 :by afnutequipped-bolt 'S5-passed through Aalined bores said links and! anyoneof thefbo'res side draftfonfthe'plowmay-be offset, at will.k

'l2-he other or movable end Tof-fthe; draft lever `33 is yieldingly connected` ,tol `the fclevis' `bar `r29 by a long mit-equipped-eye-boltv-and a coiled spring 37.V The head of the ,eye-

@bar .29- and isy yieldinglyx attachedy thereto for Y horizontal 4swinging movement by, ja

short :nut-equipped; bolt Blpass'edv through one of the-'boresSQfin saidcclevis'bar.

. Thefbody ofthe bolt. works through 'a long; slot V39", formed- 5in-f the free t or movable end of lthe:draft-lever 83, -'and, nthe Lspring 3:7 encircle'sthe oi'iterend-offsaidfbolt for com-pression between- .c the: cn-utfv thereon y vjnstably connects the Ilong 4arni of` the rtrip 31, with.' the 1 movable yend 'of the {dra-ft lever .33'. The; endf of fthe rod '38, at the draftfleverI 33, f isscrewf-thneaded :to-1 receive af nut .lfby-.wh-ieh the operative link of -saidf rod ,may bevaried?, lat wi-llf ntermediately connected't-o' the ldraft lever 33', is -a dev-i942 provided for attachingthe-:plowl to a'draft equalizer or a`v tractor.

While'the plow ybottom-is moving- :through Y t-he ground, the spring 7, 37 v is of :such tension as :to bel-compressed, substantially-'as sho-'wn in `E`ig:.4, land this''tension mayfbevaried,

at will, by adjusting the nut on. the bolt "36" `Inf ease-the plowfbottonrstrikes an;l obstruction, the' draft leverv v 33 1 will bey moved :out :of its: normal f position, thereby: further compressing the-,spring 37".; 'lihgismovement ofthe idraft lever 331- williz-also .fdraw the -rod 40 forward and lactuantefthe trip f3-1e,.- f-As previously stated, the movementfofrthel tnipl 'will straighten the toggle lever 121-3 thus 12o Y --permitting ,the plow?Y beam; 6; tomove ifupwardly and rearwardlyand; car/ryv th'evplow Y bottomf therewith Yto E 'clear @the obstruction. After .thef'plow xbottomflis clear off theol)- struction, the same may` beagaini-set into f Ehe-:expression stra-ighteningethe 'toggle lever is herein-- used,A in` a-broad'; sense, to

A indicate' i jthe,fpositionf lof I theftoggle 'lever,

E'thezground by peratingzt'heafoot lever 15,. Aas!previously,described..

when moved from a buckled position to a released position, or, in other words, beyond a dead center.

What I claim is i. A plow having its beam supported for raising and lowering movement, and a t0ggle lever for raising and lowering the beam, said toggle lever when buckled arranged to hold the beam in its lowered position, in combination with a draft device yieldingly attached to the beam, of a trip for straightening the toggle lever to permit the plow to rise and aconnection between the draft device and trip, whereby said trip will be actuated when the plow strikes an obstruction.

2. A plow having its beam supported for raising and lowering movement, and a toggle lever for raising and lowering the beam, said toggle lever when buckled arranged to hold the beam in its lowered position, in combination with a draft device variably and yieldingly attached to the beam, of a trip for straightening the toggle lever to permit the plow to rise, and a connection between the draft device and trip, whereby said trip will be actuated when the plow strikes an obstruction.

3. A plow having its beam supported for raising and lowering movement, and a toggle lever for raising and lowering the beam, said toggle lever when buckled arranged to hold the beam 'in its lowered position, in combination with a trip for straightening the toggle lever to permit the plow to rise, of a draft device including a lever having one of its ends pivoted to the plow beam and its other end yieldingly connected thereto, and a connection between the movable end of the draft lever and the trip,`

whereby said trip will be actuated when the plow strikes an obstruction.

4. A plow having its beam supported for raising and lowering movement, and a toggle lever for raising and lowering the beam, said toggle lever when buckled arranged to hold the beam in its lowered position, in combination with a trip for straightening the toggle lever` to permit the plow to rise, of a clevis bar on the plow beam, a lever, a link connecting one end of the lever to the clevis lbar, a nut-equipped eye-bolt attached to the clevis bar and extended through an aperture in the movable end of the lever, a coiled spring encircling the eye-bolt. between its nut and the draft lever, and a connection between the draft lever and trip, whereby said trip will be actuated when the plow strikes an obstruction.

5. A plow having its beam supported for raising and lowering movement, and a toggle lever for raising and lowering the beam, said toggle lever when buckled arranged to hold the beam in its lowered position, in combination with a trip for straightening the toggle lever to permit the plow to rise, of a clevis 'bar on the plow beam, a lever, a link connecting one end of the lever to the clevis bar, a nut-equipped eye-bolt attached to the clevis bar and extended through an aperture in the movable end of the lever, a coiled spring encircling the eyebolt between its nut and the draft lever, and an adjustable connection between the draft lever and trip, whereby said trip will be actuated when the plow strikes an obstruction.

In testimony whereof I aliix my signature in presence of two witnesses.

JOI-IN C. DAI-IL.

Witnesses:

F. L. HILL, W. H. KINLER.

Copies of this patent may be obtained for ve cents each, byv addressing the Commissioner of Patents, Washington, D. G. 

